Camera optical lens

ABSTRACT

The present disclosure provides a camera optical lens including, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens having a positive refractive power, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; and the camera optical lens satisfies conditions of: 0.95≤f/TTL; 3.50≤f2/f≤5.00; and −20.00≤(R11+R12)/(R11−R12)≤−3.00. The camera optical lens can achieve good optical performance while meeting the design requirements for large aperture, long focal length and ultra-thinness.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, particular,to a camera optical lens suitable for handheld devices, such as smartphones and digital cameras, and imaging devices, such as monitors or PClenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand forminiature camera lens is increasing day by day, but in general thephotosensitive devices of camera lens are nothing more than ChargeCoupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor(CMOS sensor), and as the progress of the semiconductor manufacturingtechnology makes the pixel size of the photosensitive devices becomesmaller, plus the current development trend of electronic productstowards better functions and thinner and smaller dimensions, miniaturecamera lens with good imaging quality therefore have become a mainstreamin the market.

In order to obtain better imaging quality, the lens that istraditionally equipped in mobile phone cameras adopts a three-piece,four-piece, or even five-piece or six-piece lens structure. However,with the development of technology and the increase of the diversedemands of users, and as the pixel area of photosensitive devices isbecoming smaller and smaller and the requirement of the system on theimaging quality is improving constantly, the eight-piece lens structuregradually appears in lens designs. Although the typical eight-piece lensalready has good optical performance, its optical power, lens spacingand lens shape remain unreasonable to some extents, resulting in thatthe lens structure, which, even though, has excellent opticalperformance, is not able to meet the design requirement for largeaperture, long focal length and ultra-thinness.

Thus, there is a need to provide a camera optical lens having excellentoptical performance and meeting the design requirement for largeaperture, long focal length and ultra-thinness.

SUMMARY

To address the above issues, an object of the present disclosure is toprovide a camera optical lens that meets a design requirement of largeaperture, long focal length and ultra-thinness while having excellentoptical performance.

For solving the above technical problem, embodiments of the presentdisclosure provide a camera optical lens. The camera optical lensincludes, from an object side to an image side in sequence: a first lenshaving a positive refractive power, a second lens having a positiverefractive power, a third lens, a fourth lens, a fifth lens, a sixthlens, a seventh lens, and an eighth lens; and the camera optical lenssatisfies conditions of: 0.95≤f/TTL; 3.50≤f2/f≤5.00; and−20.00≤(R11+R12)/(R11−R12)≤−3.00; where TTL denotes a total opticallength from an object-side surface of the first lens to an image surfaceof the camera optical lens along an optical axis; f denotes a focallength of the camera optical lens; f2 denotes a focal length of thesecond lens; R11 denotes a central curvature radius of an object-sidesurface of the sixth lens; and R12 denotes a central curvature radius ofan image-side surface of the sixth lens.

As an improvement, the camera optical lens further satisfies a conditionof: −7.50≤f6/f7≤−1.50; where f6 denotes a focal length of the sixthlens; and f7 denotes a focal length of the seventh lens.

As an improvement, the camera optical lens further satisfies conditionsof: 0.23≤f1/f≤0.70; −2.23≤(R1+R2)/(R1−R2)≤−0.70; and 0.05≤d1/TTL≤0.17;where f1 denotes a focal length of the first lens; R1 denotes a centralcurvature radius of the object-side surface of the first lens; R2denotes a central curvature radius of an image-side surface of the firstlens; and d1 denotes an on-axis thickness of the first lens.

As an improvement, the camera optical lens further satisfies conditionsof: −7.48≤(R3+R4)/(R3−R4)≤−0.98; and 0.02≤d3/TTL≤0.05; where R3 denotesa central curvature radius of an object-side surface of the second lens;R4 denotes a central curvature radius of an image-side surface of thesecond lens; and d3 denotes an on-axis thickness of the second lens.

As an improvement, the camera optical lens further satisfies conditionsof: −1.72≤f3/f≤−0.50; 0.06≤(R5+R6)/(R5−R6)≤0.56; and 0.02≤d5/TTL≤0.05;where f3 denotes a focal length of the third lens; R5 denotes a centralcurvature radius of an object-side surface of the third lens; R6 denotesa central curvature radius of an image-side surface of the third lens;and d5 denotes an on-axis thickness of the third lens.

As an improvement, the camera optical lens further satisfies conditionsof: 0.47≤f4/f≤1.73; 0≤(R7+R8)/(R7−R8)≤0.09; and 0.02≤d7/TTL≤0.05; wheref4 denotes a focal length of the fourth lens; R7 denotes a centralcurvature radius of an object-side surface of the fourth lens; R8denotes a central curvature radius of an image-side surface of thefourth lens; and d7 denotes an on-axis thickness of the fourth lens.

As an improvement, the camera optical lens further satisfies followingconditions: −1.24≤f5/f≤−0.35; −0.58≤(R9+R10)/(R9−R10)≤−0.18; and0.02≤d9/TTL≤0.05; where f5 denotes a focal length of the fifth lens; R9denotes a curvature radius of an object-side surface of the fifth lens;R10 denotes a curvature radius of an image-side surface of the fifthlens; and d9 denotes an on-axis thickness of the fifth lens.

As an improvement, the camera optical lens further satisfies a conditionof: 1.66≤f6/f≤19.94; and 0.08≤d11/TTL≤0.28; where f6 denotes a focallength of the sixth lens; and d11 denotes an on-axis thickness of thesixth lens.

As an improvement, the camera optical lens further satisfies a conditionof: −3.89≤f7/f≤−1.22; 0.21≤(R13+R14)/(R13−R14)≤0.74; and0.03≤d13/TTL≤0.10; where f7 denotes a focal length of the seventh lens;R13 denotes a central curvature radius of an object-side surface of theseventh lens; R14 denotes a central curvature radius of an image-sidesurface of the seventh lens; and d13 denotes an on-axis thickness of theseventh lens.

As an improvement, the camera optical lens further satisfies a conditionof: −28.83≤f8/f≤26.51; −28.54≤(R15+R16)/(R15−R16)≤9.70; and0.12≤d15/TTL≤0.39; where f8 denotes a focal length of the eighth lens;R15 denotes a central curvature radius of an object-side surface of theeighth lens; R16 denotes a central curvature radius of an image-sidesurface of the eighth lens; and d15 denotes an on-axis thickness of theeighth lens.

The present disclosure is advantageous in: the camera optical lens inthe present disclosure has excellent optical performance and hascharacteristics of large aperture, long focal length and ultra-thinness,and is especially applicable to mobile phone camera lens assemblies andWEB camera lenses composed by such camera elements as CCD and CMOS forhigh pixels.

BRIEF DESCRIPTION OF DRAWINGS

To illustrate the technical solutions according to the embodiments ofthe present disclosure or in the prior art more clearly, theaccompanying drawings for describing the embodiments or the prior artare introduced briefly in the following. Apparently, the accompanyingdrawings in the following description are only some embodiments of thepresent disclosure, and persons of ordinary skill in the art can deriveother drawings from the accompanying drawings without creative efforts.

FIG. 1 is a schematic diagram of a structure of a camera optical lensaccording to Embodiment 1 of the present disclosure.

FIG. 2 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 1 .

FIG. 3 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 1 .

FIG. 4 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 1 .

FIG. 5 is a schematic diagram of a structure of a camera optical lensaccording to Embodiment 2 of the present disclosure.

FIG. 6 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 5 .

FIG. 7 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 5 .

FIG. 8 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 5 .

FIG. 9 is a schematic diagram of a structure of a camera optical lensaccording to Embodiment 3 of the present disclosure.

FIG. 10 is a schematic diagram of a longitudinal aberration of thecamera optical lens shown in FIG. 9 .

FIG. 11 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 9 .

FIG. 12 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 9 .

DETAILED DESCRIPTION OF EMBODIMENTS

To make the objects, technical solutions, and advantages of the presentdisclosure clearer, embodiments of the present disclosure are describedin detail with reference to accompanying drawings in the following. Aperson of ordinary skill in the art can understand that, in theembodiments of the present disclosure, many technical details areprovided to make readers better understand the present disclosure.However, even without these technical details and any changes andmodifications based on the following embodiments, technical solutionsrequired to be protected by the present disclosure can be implemented.

Embodiment 1

Referring to the accompanying drawing, the present disclosure provides acamera optical lens 10. FIG. 1 shows a schematic diagram of a cameraoptical lens 10 according to Embodiment 1 of the present disclosure, andthe camera optical lens 10 includes eight lenses. Specifically, anobject side refers to the left side, an image side refers to the rightside, and the camera optical lens 10 includes, from the object side tothe image side in sequence: an aperture S1, a first lens L1, a secondlens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixthlens L6, a seventh lens L7 and an eighth lens L8. An optical elementsuch as an optical filter GF can be arranged between the eighth lens L8and an image surface Si.

In this embodiment, the first lens L1 has a positive refractive power,the second lens L2 has a positive refractive power, the third lens L3has a negative refractive power, the fourth lens L4 has a positiverefractive power, the fifth lens L5 has a negative refractive power, thesixth lens L6 has a positive refractive power, the seventh lens L7 has anegative refractive power and the eighth lens L8 has a positiverefractive power. In other alternative embodiments, the third lens L3 tothe eighth lens L8 may have other refractive powers than those of thepresent embodiment.

In this embodiment, the first lens L1 has a positive refractive power,which facilitates improving performance of the camera optical lens.

In this embodiment, the first lens L1, the second lens L2, the thirdlens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, theseventh lens L7 and the eighth lens L8 are made of plastic material. Inother alternative embodiments, the lenses may be made of other material.

In this embodiment, a total optical length from the object side surfaceof the first lens L1 to an image surface Si of the camera optical lens10 along an optical axis is defined as TTL, a focal length of the cameraoptical lens 10 is defined as f, a focal length of the second lens L2 isdefined as f2, a central curvature radius of an object-side surface ofthe sixth lens L6 is defined as R11, and a central curvature radius ofan image-side surface of the sixth lens L6 is defined as R12. The cameraoptical lens 10 satisfies conditions of:0.95≤f/TTL;  (1)3.50≤f2/f≤5.00; and  (2)−20.00≤(R11+R12)/(R11−R12)≤−3.00.  (3)

Condition (1) specifies a ratio of the focal length of the cameraoptical lens 10 and the total optical length of the camera optical lens10. When the relation meets the condition (1), given a same totaloptical length, the camera optical lens 10 has the focal length longer.

Condition (2) specifies a ratio of the focal length of the second lensL2 to the focal length of the camera optical lens 10. Within thiscondition, a spherical aberration and a field curvature of the cameraoptical lens 10 can be effectively balanced.

Condition (3) specifies a shape of the sixth lens L6. Within thiscondition, the deflection degree of the light passing through the lenscan be alleviated, and the aberration can be effectively reduced.Preferably, the camera optical lens 10 satisfies a condition of−19.85≤(R11+R12)/(R11−R12)≤−3.11.

A focal length of the sixth lens L6 is defined as f6, and a focal lengthof the seventh lens L7 is defined as f7. The camera optical lens 10satisfies a condition of −7.50≤f6/f7≤−1.50, which specifies a ratio ofthe focal length of the sixth lens L6 and the focal length of theseventh lens L7. With reasonable distribution of the refractive power,the camera optical lens 10 has better imaging quality and lowersensitivity. Preferably, the camera optical lens 10 satisfies acondition of −7.34≤f6/f7≤−1.61.

In this embodiment, the first lens L1 includes an object-side surfacebeing convex in a paraxial region and an image-side surface beingconcave in the paraxial region. In other alternative embodiments, theobject-side surface and the image-side surface of the first lens L1 mayhave a distribution in convex and concave other than that of the presentembodiment.

A focal length of the first lens is defined as f1, and the focal lengthof the camera optical lens 10 is defined as f. The camera optical lens10 satisfies a condition of 0.23≤f1/f≤0.70, which specifies a ratio ofthe focal length of the first lens L1 to the focal length of the cameraoptical lens 10. Within this condition, the first lens L1 has anappropriate positive refractive power, the correction of the aberrationof the camera optical lens is facilitated, and meanwhile the developmentof the lenses towards ultra-thinness is facilitated. Preferably, thecamera optical lens 10 satisfies a condition of 0.37≤f1/f≤0.56.

A central curvature radius of an object-side surface of the first lensL1 is defined as R1, and a central curvature radius of an image-sidesurface of the first lens L1 is defined as R2. The camera optical lens10 satisfies a condition of −2.23≤(R1+R2)/(R1−R2)≤−0.70. This canreasonably control a shape of the first lens L1 in such a manner thatthe first lens L1 can effectively correct a spherical aberration of thecamera optical lens. Preferably, the camera optical lens 10 satisfies acondition of −1.39≤(R1+R2)/(R1−R2)≤−0.88.

An on-axis thickness of the first lens L1 is defined as d1, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.05≤d1/TTL≤0.17.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.08≤d1/TTL≤0.13.

In this embodiment, the second lens L2 includes an object-side surfacebeing convex in a paraxial region and an image-side surface beingconcave in the paraxial region. In other alternative embodiments, theobject-side surface and the image-side surface of the second lens L2 mayhave a distribution in convex and concave other than that of the presentembodiment.

A central curvature radius of the object-side surface of the second lensL2 is defined as R3, and a central curvature radius of the image-sidesurface of the second lens L2 is defined as R4. The camera optical lens10 satisfies a condition of −7.48≤(R3+R4)/(R3−R4)≤−0.98, which specifiesa shape of the second lens L2. With development of the lenses towardsultra-thinness, correction of the on-axis chromatic aberration isfacilitated. Preferably, the camera optical lens 10 satisfies acondition of −4.68≤(R3+R4)/(R3−R4)≤−1.22.

An on-axis thickness of the second lens L2 is defines as d3, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.02≤d3/TTL≤0.05.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.03≤d3/TTL≤0.04.

In this embodiment, the third lens L3 includes an object-side surfacebeing concave in a paraxial region and an image-side surface beingconcave in the paraxial region. In other alternative embodiments, theobject-side surface and the image-side surface of the third lens L3 mayhave a distribution in convex and concave other than that of the presentembodiment.

The focal length of the camera optical lens 10 is defined as f, a focallength of the third lens L3 is defined as f3. The camera optical lens 10satisfies a condition of −1.72≤f3/f≤−0.50. With reasonable distributionof the refractive power, the camera optical lens 10 has better imagingquality and lower sensitivity. Preferably, the camera optical lens 10satisfies a condition of −1.07≤f3/f≤−0.63.

A central curvature radius of the object-side surface of the third lensL3 is defined as R5, and a central curvature radius of the image-sidesurface of the third lens L3 is defined as R6. The camera optical lens10 satisfies a condition of 0.06≤(R5+R6)/(R5−R6)≤0.56, which effectivelycontrols a shape of the third lens L3 and facilitates shaping of thethird lens L3. Within this condition, the deflection degree of the lightpassing through the lens can be alleviated, and the aberration can beeffectively reduced. Preferably, the camera optical lens 10 satisfies acondition of 0.10≤(R5+R6)/(R5−R6)≤0.45.

An on-axis thickness of the third lens L3 is defined as d5, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.02≤d5/TTL≤0.05.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.03≤d5/TTL≤0.04.

In this embodiment, the fourth lens L4 includes an object-side surfacebeing convex in a paraxial region and an image-side surface being convexin the paraxial region. In other alternative embodiments, theobject-side surface and the image-side surface of the fourth lens L4 mayhave a distribution in convex and concave other than that of the presentembodiment.

A focal length of the fourth lens L4 is defined as f4, and the focallength of the camera optical lens 10 is defined as f. The camera opticallens 10 satisfies a condition of 0.47≤f4/f≤1.73, which specifies a ratioof the focal length of the fourth lens L4 and the focal length of thecamera optical lens 10. Within this condition, improvement ofperformance of the camera optical lens is facilitated. Preferably, thecamera optical lens 10 satisfies a condition of 0.75≤f4/f≤1.38.

A central curvature radius of the object-side surface of the fourth lensL4 is defined as R7, and a central curvature radius of the image-sidesurface of the fourth lens L4 is defined as R8. The camera optical lens10 satisfies a condition of 0≤(R7+R8)/(R7−R8)≤0.09, which specifies ashape of the fourth lens L4. Within this range, the development of thelenses towards ultra-thinness would facilitate correcting the off-axisaberration. Preferably, the camera optical lens 10 satisfies a conditionof 0≤(R7+R8)/(R7−R8)≤0.07.

An on-axis thickness of the fourth lens L4 is defined as d7, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.02≤d7/TTL≤0.05.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.03≤d7/TTL≤0.04.

In this embodiment, the fifth lens L5 includes an object-side surfacebeing concave in a paraxial region and an image-side surface beingconcave in the paraxial region. In other alternative embodiments, theobject-side surface and the image-side surface of the fifth lens L5 mayhave a distribution in convex and concave other than that of the presentembodiment.

A focal length of the fifth lens L5 is defined as f5, and the focallength of the camera optical lens 10 is defined as f. The camera opticallens 10 satisfies a condition of −1.24≤f5/f≤−0.35, which specifies thefifth lens L5 so as to enable the light angle of the camera optical lens10 to be gradual and reduce the tolerance sensitivity. Preferably, thecamera optical lens 10 satisfies a condition of −0.78≤f5/f≤−0.44.

A central curvature radius of the object-side surface of the fifth lensL5 is defined as R9, and a central curvature radius of the image-sidesurface of the fifth lens L5 is defined as R10. The camera optical lens10 satisfies a condition of −0.58≤(R9+R10)/(R9−R10)≤−0.18, whichspecifies a shape of the fifth lens L5. Within this range, thedevelopment of the lenses towards ultra-thinness would facilitatecorrecting the off-axis aberration. Preferably, the camera optical lens10 satisfies a condition of −0.36≤(R9+R10)/(R9−R10)≤−0.23.

An on-axis thickness of the fifth lens L5 is defined as d9, the totaloptical length of the camera optical lens 10 is defined as TTL. Thecamera optical lens 10 satisfies a condition of 0.02≤d9/TTL≤0.05. Withinthis condition, ultra-thinness of the lenses is facilitated. Preferably,the camera optical lens 10 satisfies a condition of 0.03≤d9/TTL≤0.04.

In this embodiment, the sixth lens L6 includes an object-side surfacebeing convex in a paraxial region and an image-side surface beingconcave in the paraxial region. In other alternative embodiments, theobject-side surface and the image-side surface of the sixth lens L6 mayhave a distribution in convex and concave other than that of the presentembodiment.

A focal length of the sixth lens L6 is defined as f6, and the focallength of the camera optical lens 10 is defined as f. The camera opticallens 10 satisfies a condition of 1.66≤f6/f≤19.94. With reasonabledistribution of the refractive power, the camera optical lens 10 hasbetter imaging quality and lower sensitivity. Preferably, the cameraoptical lens 10 satisfies a condition of 2.66≤f6/f≤15.96.

An on-axis thickness of the sixth lens L6 is defined as d11, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.08≤d11/TTL≤0.28.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.12≤d11/TTL≤0.22.

In this embodiment, the seventh lens L7 includes an object-side surfacebeing concave in a paraxial region and an image-side surface beingconcave in the paraxial region. In other alternative embodiments, theobject-side surface and the image-side surface of the seventh lens L7may have a distribution in convex and concave other than that of thepresent embodiment.

A focal length of the seventh lens L7 is defined as f7, and the focallength of the camera optical lens 10 is defined as f. The camera opticallens 10 satisfies a condition of −3.89≤f7/f≤−1.22. With reasonabledistribution of the refractive power, the camera optical lens 10 hasbetter imaging quality and lower sensitivity. Preferably, the cameraoptical lens 10 satisfies a condition of −2.43≤f7/f≤−1.52.

A central curvature radius of the object-side surface of the seventhlens L7 is defined as R13, and a central curvature radius of theimage-side surface of the seventh lens L7 is defined as R14. The cameraoptical lens 10 satisfies a condition of 0.21≤(R13+R14)/(R13−R14)≤0.74,which specifies a shape of the seventh lens L7. Within this condition,the development of the lenses towards ultra-thinness would facilitatecorrecting the off-axis aberration. Preferably, the camera optical lens10 satisfies a condition of 0.33≤(R13+R14)/(R13−R14)≤0.59.

An on-axis thickness of the seventh lens L7 is defined as d13, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.03≤d13/TTL≤0.10.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.05≤d13/TTL≤0.08.

In this embodiment, the eighth lens L8 includes an object-side surfacebeing convex in a paraxial region and an image-side surface beingconcave in the paraxial region. In other alternative embodiments, theobject-side surface and the image-side surface of the eighth lens L8 mayhave a distribution in convex and concave other than that of the presentembodiment.

A focal length of the eighth lens L8 is defined as f8, and the focallength of the camera optical lens 10 is defined as f. The camera opticallens 10 satisfies a condition of −28.83≤f8/f≤26.51. With reasonabledistribution of the refractive power, the camera optical lens 10 hasbetter imaging quality and lower sensitivity. Preferably, the cameraoptical lens 10 satisfies a condition of −18.02≤f8/f≤21.21.

The central curvature radius of the object-side surface of the eighthlens L8 is defined as R15, and the central curvature radius of theimage-side surface of the eighth lens L8 is defined as R16. The cameraoptical lens 10 satisfies a condition of−28.54≤(R15+R16)/(R15−R16)≤9.70, which specifies a shape of the eighthlens L8. Within this condition, the development of the lenses towardsultra-thinness would facilitate correcting the off-axis aberration.Preferably, the camera optical lens 10 satisfies a condition of−17.84≤(R15+R16)/(R15−R16)≤7.76.

An on-axis thickness of the eighth lens L8 is defined as d15, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.12≤d15/TTL≤0.39.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.19≤d15/TTL≤0.31.

It should be appreciated that, in other embodiments, configuration ofthe object-side surfaces and the image-side surfaces of the first lensL1, the second lens L2, the third lens L3, the fourth lens L4, the fifthlens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8may have a distribution in convex and concave other than that of theabove-discussed embodiment.

In this embodiment, the focal length of the camera optical lens 10 isdefined as f, and a combined focal length of the first lens L1 and ofthe second lens L2 is defined as f12. The camera optical lens 10satisfies a condition of 0.21≤f12/f≤0.65. Within this condition, theaberration and distortion of the camera optical lens 10 can beeliminated and a back focal length of the camera optical lens isreduced, thereby maintaining miniaturization of the camera optical lens.Preferably, the camera optical lens 10 satisfies a condition of0.34≤f12/f≤0.52.

In this embodiment, an F number of the camera optical lens 10 is definedas FNO, and the camera optical lens 10 satisfies a condition ofFNO≤2.83. This enables the camera optical lens 10 to achieve largeaperture and excellent imaging performance.

In this embodiment, an image height of the camera optical lens 10 isdefined as IH, and the focal length of the camera optical lens 10 isdefined as f. The camera optical lens 10 satisfies a condition off/IH≥1.95, which enables the camera optical lens 10 to achieve longfocal length.

In this embodiment, the image height of the camera optical lens 10 isdefined as IH, and the total optical length of the camera optical lens10 is defined as TTL. The camera optical lens 10 satisfies a conditionof TTL/IH≤2.15, which facilitates ultra-thinness of the lenses.

When the above relationships are satisfied, the camera optical lens 10meets the design requirements of large aperture, long focal length andultra-thinness while having excellent optical imaging performance. Basedon the characteristics of the camera optical lens 10, the camera opticallens 10 is particularly applicable to mobile camera lens assemblies andWEB camera lenses composed of such camera elements as CCD and CMOS forhigh pixels.

The camera optical lens 10 will be further described with reference tothe following examples. Symbols used in various examples are shown asfollows. The focal length, on-axis distance, central curvature radius,on-axis thickness, inflexion point position, and arrest point positionare all in units of mm.

TTL: Total optical length (the distance from the object side surface ofthe first lens L1 to the image surface Si of the camera optical lensalong the optical axis) in mm.

FNO: ratio of an effective focal length and an entrance pupil diameterof the camera optical lens.

In addition, inflexion points and/or arrest points can be arranged onthe object-side surface and/or the image-side surface of the lenses, soas to satisfy the demand for high quality imaging. The description belowcan be referred for specific implementations.

The design data of the camera optical lens 10 in Embodiment 1 of thepresent disclosure are shown in Table 1 and Table 2.

TABLE 1 R d nd νd S1 ∞ d0= 0.009 R1 1.637 d1= 0.715 nd1 1.5444 ν1 55.82R2 30.376 d2= 0.032 R3 9.580 d3= 0.233 nd2 1.6700 ν2 19.39 R4 16.572 d4=0.075 R5 −10.126 d5= 0.230 nd3 1.5444 ν3 55.82 R6 4.596 d6= 0.117 R78.889 d7= 0.230 nd4 1.5444 ν4 55.82 R8 −7.930 d8= 0.030 R9 −4.392 d9=0.256 nd5 1.6610 ν5 20.53 R10 7.681 d10= 0.085 R11 8.566 d11= 1.074 nd61.6700 ν6 19.39 R12 9.482 d12= 0.128 R13 −23.446 d13= 0.482 nd7 1.5444ν7 55.82 R14 9.611 d14= 0.406 R15 11.275 d15= 1.800 nd8 1.5844 ν8 28.22R16 13.511 d16= 0.201 R17 ∞ d17= 0.210 ndg 1.5168 νg 64.17 R18 ∞ d18=0.704

In the table, meanings of various symbols will be described as follows.

S1: aperture;

R: central curvature radius of an optical surface;

R1: central curvature radius of the object-side surface of the firstlens L1;

R2: central curvature radius of the image-side surface of the first lensL1;

R3: central curvature radius of the object-side surface of the secondlens L2;

R4: central curvature radius of the image-side surface of the secondlens L2;

R5: central curvature radius of the object-side surface of the thirdlens L3;

R6: central curvature radius of the image-side surface of the third lensL3;

R7: central curvature radius of the object-side surface of the fourthlens L4;

R8: central curvature radius of the image-side surface of the fourthlens L4;

R9: central curvature radius of the object-side surface of the fifthlens L5;

R10: central curvature radius of the image-side surface of the fifthlens L5;

R11: central curvature radius of the object-side surface of the sixthlens L6;

R12: central curvature radius of the image-side surface of the sixthlens L6;

R13: central curvature radius of the object-side surface of the seventhlens L7;

R14: central curvature radius of the image-side surface of the seventhlens L7;

R15: central curvature radius of an object-side surface of the eighthlens L8;

R16: central curvature radius of an image-side surface of the eighthlens L8;

R17: central curvature radius of an object-side surface of the opticalfilter GF;

R18: central curvature radius of an image-side surface of the opticalfilter GF;

d: on-axis thickness of a lens and an on-axis distance between lenses;

d0: on-axis distance from the aperture Si to the object-side surface ofthe first lens L1;

d1: on-axis thickness of the first lens L1;

d2: on-axis distance from the image-side surface of the first lens L1 tothe object-side surface of the second lens L2;

d3: on-axis thickness of the second lens L2;

d4: on-axis distance from the image-side surface of the second lens L2to the object-side surface of the third lens L3;

d5: on-axis thickness of the third lens L3;

d6: on-axis distance from the image-side surface of the third lens L3 tothe object-side surface of the fourth lens L4;

d7: on-axis thickness of the fourth lens L4;

d8: on-axis distance from the image-side surface of the fourth lens L4to the object-side surface of the fifth lens L5;

d9: on-axis thickness of the fifth lens L5;

d10: on-axis distance from the image-side surface of the fifth lens L5to the object-side surface of the sixth lens L6;

d11: on-axis thickness of the sixth lens L6;

d12: on-axis distance from the image-side surface of the sixth lens L6to the object-side surface of the seventh lens L7;

d13: on-axis thickness of the seventh lens L7;

d14: on-axis distance from the image-side surface of the seventh lens L7to the object-side surface of the eighth lens L8;

d15: on-axis thickness of the eighth lens L8;

d16: on-axis distance from the image-side surface of the eighth lens L8to the object-side surface of the optical filter GF;

d17: on-axis thickness of the optical filter GF;

d18: on-axis distance from the image-side surface of the optical filterGF to the image surface Si;

nd: refractive index of the d line;

nd1: refractive index of the d line of the first lens L1;

nd2: refractive index of the d line of the second lens L2;

nd3: refractive index of the d line of the third lens L3;

nd4: refractive index of the d line of the fourth lens L4;

nd5: refractive index of the d line of the fifth lens L5;

nd6: refractive index of the d line of the sixth lens L6;

nd7: refractive index of the d line of the seventh lens L7;

nd8: refractive index of the d line of the eighth lens L8;

ndg: refractive index of the d line of the optical filter GF;

vd: abbe number;

v1: abbe number of the first lens L1;

v2: abbe number of the second lens L2;

v3: abbe number of the third lens L3;

v4: abbe number of the fourth lens L4;

v5: abbe number of the fifth lens L5;

v6: abbe number of the sixth lens L6;

v7: abbe number of the seventh lens L7;

v8: abbe number of the eighth lens L8;

vg: abbe number of the optical filter GF.

Table 2 shows aspheric surface data of the camera optical lens 10 inEmbodiment 1 of the present disclosure.

TABLE 2 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10A12 R1 −3.6143E−01  1.1852E−02 −5.2187E−04   2.2923E−02 −8.6766E−021.9439E−01 R2  5.7947E+01 −6.9011E−02 2.4127E−01 −3.5561E−01 −1.2343E−011.2847E+00 R3  3.4032E+01 −7.1677E−02 2.4174E−01 −2.2641E−01 −4.5530E−011.5740E+00 R4 −8.4133E+01  4.5158E−03 −1.8529E−01   1.2606E+00−3.7157E+00 6.0955E+00 R5 −4.1140E+01  5.6382E−02 −6.7378E−01  3.2376E+00 −9.3402E+00 1.7496E+01 R6 −5.2871E+01  1.4357E−01−8.4531E−01   3.4446E+00 −1.0769E+01 2.3399E+01 R7 −9.9000E+01−2.5243E−02 −3.7778E−01   2.2246E+00 −9.3982E+00 2.4992E+01 R8 5.6809E+01 −2.0145E−01 9.8535E−01 −6.0884E−01 −1.5341E+01 7.2774E+01 R9−1.6892E+01 −1.0104E−01 9.7325E−01 −2.5233E+00 −5.1277E+00 4.3568E+01R10  9.8184E−01 −9.2368E−02 4.9280E−01 −2.3693E+00  6.5023E+00−1.0575E+01  R11  4.1537E+01 −2.2539E−01 2.9925E−01 −8.7778E−01 1.9688E+00 −2.6867E+00  R12  3.2003E+01 −7.8876E−02 8.9231E−02−8.3022E−02  9.0511E−02 −7.7221E−02  R13 −1.0348E+01 −7.3654E−021.6036E−01 −1.6988E−01  1.2621E−01 −7.0352E−02  R14 −9.9000E+01−5.4345E−02 1.1359E−01 −1.0019E−01  5.1622E−02 −1.7225E−02  R15−1.1857E+01 −5.6851E−02 4.0324E−02 −1.8026E−02  5.7478E−03 −1.3188E−03 R16 −8.6078E+00 −2.5334E−02 4.4760E−03 −4.1878E−04 −1.5966E−047.6330E−05 Conic coefficient Aspheric surface coefficients k A14 A16 A18A20 R1 −3.6143E−01 −2.7080E−01 2.2699E−01 −1.0545E−01  2.0955E−02 R2 5.7947E+01 −2.0696E+00 1.6446E+00 −6.7898E−01  1.1907E−01 R3 3.4032E+01 −1.8469E+00 9.7294E−01 −1.7894E−01 −9.4272E−03 R4−8.4133E+01 −5.6250E+00 2.6158E+00 −3.9549E−01 −4.7456E−02 R5−4.1140E+01 −2.1316E+01 1.6508E+01 −7.4370E+00  1.4994E+00 R6−5.2871E+01 −3.3994E+01 3.1102E+01 −1.5905E+01  3.4199E+00 R7−9.9000E+01 −4.1630E+01 4.0873E+01 −2.0956E+01  4.1254E+00 R8 5.6809E+01 −1.5636E+02 1.7962E+02 −1.0622E+02  2.5264E+01 R9−1.6892E+01 −1.0669E+02 1.3030E+02 −8.0313E+01  1.9832E+01 R10 9.8184E−01  1.0616E+01 −6.4330E+00   2.1414E+00 −2.9901E−01 R11 4.1537E+01  2.3315E+00 −1.3017E+00   4.2788E−01 −6.2444E−02 R12 3.2003E+01  4.2325E−02 −1.4026E−02   2.5461E−03 −1.9332E−04 R13−1.0348E+01  2.8200E−02 −7.2977E−03   1.0599E−03 −6.4934E−05 R14−9.9000E+01  3.7761E−03 −5.2552E−04   4.2040E−05 −1.4681E−06 R15−1.1857E+01  2.1160E−04 −2.2444E−05   1.3944E−06 −3.7903E−08 R16−8.6078E+00 −1.5499E−05 1.7346E−06 −1.0302E−07  2.5010E−09

In table 2, K is a conic coefficient, and A4, A6, A8, A10, A12, A14,A16, A18 and A20 are aspheric surface coefficients.y=(x ² /R)/{1+[1−(k+1)(x ² /R ²)]^(1/2) }+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰+A12x ¹² +A14x ¹⁴ +A16x ¹⁶ +A18x ¹⁸ +A20x ²⁰  (4)

Herein, x denotes a vertical distance between a point in the asphericcurve and the optical axis, and y denotes an aspheric depth (i.e. avertical distance between the point having a distance of x from theoptical axis and a plane tangent to the vertex on the optical axis ofthe aspheric surface).

For convenience, an aspheric surface of each lens surface uses theaspheric surfaces shown in the above formula (1). However, the presentdisclosure is not limited to the aspherical polynomials form shown inthe formula (1).

Table 3 and Table 4 show design data of inflexion points and arrestpoints of each lens of the camera optical lens 10 according toEmbodiment 1 of the present disclosure. P1R1 and P1R2 represent theobject-side surface and the image-side surface of the first lens L1,P2R1 and P2R2 represent the object-side surface and the image-sidesurface of the second lens L2, P3R1 and P3R2 represent the object-sidesurface and the image-side surface of the third lens L3, P4R1 and P4R2represent the object-side surface and the image-side surface of thefourth lens L4, P5R1 and P5R2 represent the object-side surface and theimage-side surface of the fifth lens L5, P6R1 and P6R2 represent theobject-side surface and the image-side surface of the sixth lens L6,P7R1 and P7R2 represent the object-side surface and the image-sidesurface of the seventh lens L7, and P8R1 and P8R2 represent theobject-side surface and the image-side surface of the eighth lens L8.The data in the column named “inflexion point position” refers tovertical distances from inflexion points arranged on each lens surfaceto the optic axis of the camera optical lens 10. The data in the columnnamed “arrest point position” refers to vertical distances from arrestpoints arranged on each lens surface to the optical axis of the cameraoptical lens 10.

TABLE 3 Number(s) of Inflexion point Inflexion point Inflexion pointinflexion points position 1 position 2 position 3 P1R1 0 / / / P1R2 0 // / P2R1 1 0.935 / / P2R2 2 0.865 0.975 / P3R1 1 0.675 / / P3R2 2 0.5750.825 / P4R1 1 0.345 / / P4R2 0 / / / P5R1 0 / / / P5R2 0 / / / P6R1 10.235 / / P6R2 0 / / / P7R1 1 0.675 / / P7R2 1 1.255 / / P8R1 3 0.4251.135 1.905 P8R2 1 0.525 / /

TABLE 4 Number(s) of Arrest point Arrest point Arrest point arrestpoints position 1 position 2 position 3 P1R1 0 / / / P1R2 0 / / / P2R1 0/ / / P2R2 0 / / / P3R1 1 0.865 / / P3R2 0 / / / P4R1 1 0.555 / / P4R2 0/ / / P5R1 0 / / / P5R2 0 / / / P6R1 1 0.415 / / P6R2 0 / / / P7R1 11.135 / / P7R2 0 / / / P8R1 3 0.995 1.275 2.145 P8R2 1 0.955 / /

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and470 nm after passing the camera optical lens 10 in Embodiment 1,respectively. FIG. 4 illustrates a schematic diagram of a fieldcurvature and a distortion of light with a wavelength of 555 nm afterpassing the camera optical lens 10 in Embodiment 1. A field curvature Sin FIG. 4 is a field curvature in a sagittal direction, and T is a fieldcurvature in a tangential direction.

In the subsequent Table 13, various parameters of Embodiments 1, 2 and 3and values corresponding to the parameters specified in the aboveconditions are shown.

As shown in Table 13, Embodiment 1 satisfies the various conditions.

In this Embodiment, an entrance pupil diameter (ENPD) of the cameraoptical lens 10 is 2.391 mm, an image height (IH) of 1.0H is 3.400 mm,and a field of view (FOV) in a diagonal direction is 53.29°. Thus, thecamera optical lens 10 achieves large aperture, long focal length andultra-thinness, the on-axis and off-axis chromatic aberration issufficiently corrected, thereby achieving excellent optical performance.

Embodiment 2

Embodiment 2, which provides a camera optical lens 20 structurally shownin FIG. 5 , is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 inEmbodiment 2 of the present disclosure.

TABLE 5 R d nd νd S1 ∞ d0= 0.007 R1 1.656 d1= 0.736 nd1 1.5444 ν1 55.82R2 36.409 d2= 0.030 R3 10.448 d3= 0.230 nd2 1.6700 ν2 19.39 R4 22.692d4= 0.076 R5 −8.391 d5= 0.230 nd3 1.5444 ν3 55.82 R6 4.764 d6= 0.120 R78.382 d7= 0.230 nd4 1.5444 ν4 55.82 R8 −7.575 d8= 0.030 R9 −4.192 d9=0.246 nd5 1.6610 ν5 20.53 R10 7.648 d10= 0.084 R11 8.604 d11= 1.154 nd61.6700 ν6 19.39 R12 10.324 d12= 0.130 R13 −23.147 d13= 0.468 nd7 1.5444ν7 55.82 R14 9.606 d14= 0.394 R15 12.472 d15= 1.800 nd8 1.5844 ν8 28.22R16 14.352 d16= 0.201 R17 ∞ d17= 0.210 ndg 1.5168 νg 64.17 R18 ∞ d18=0.713

Table 6 shows aspheric surface data of each lens of the camera opticallens 20 in Embodiment 2 of the present disclosure.

TABLE 6 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10A12 R1 −3.6434E−01  1.1524E−02 −3.1951E−04   2.0009E−02 −7.3074E−021.5951E−01 R2 −7.4937E+01 −7.2624E−02 2.4975E−01 −3.5062E−01 −1.7870E−011.3873E+00 R3  3.7233E+01 −7.4038E−02 2.4661E−01 −2.2148E−01 −4.7822E−011.5813E+00 R4 −9.9000E+01  3.0842E−03 −1.7703E−01   1.1817E+00−3.3584E+00 5.2197E+00 R5 −3.8842E+01  5.5262E−02 −6.5385E−01  3.1097E+00 −8.8066E+00 1.6077E+01 R6 −5.5094E+01  1.3538E−01−8.1373E−01   3.2774E+00 −9.9641E+00 2.0857E+01 R7 −9.9000E+01−2.4502E−02 −3.9038E−01   2.1303E+00 −8.4965E+00 2.1439E+01 R8 5.3916E+01 −1.8047E−01 7.8050E−01  4.1962E−01 −1.7732E+01 7.3707E+01 R9−1.7234E+01 −9.9111E−02 8.3309E−01 −1.5754E+00 −7.8719E+00 4.6873E+01R10 −2.9653E+00 −1.0535E−01 4.8720E−01 −2.2039E+00  5.9273E+00−9.5271E+00  R11  4.3867E+01 −2.2320E−01 2.8530E−01 −8.1552E−01 1.8524E+00 −2.6351E+00  R12  3.6637E+01 −6.4695E−02 6.8403E−02−5.3383E−02  5.5914E−02 −4.9193E−02  R13 −3.8980E+01 −6.6562E−021.3810E−01 −1.3447E−01  9.2166E−02 −4.9354E−02  R14 −9.9000E+01−5.4331E−02 1.0847E−01 −9.1687E−02  4.5325E−02 −1.4552E−02  R15−1.3113E+01 −5.6607E−02 3.9850E−02 −1.7607E−02  5.5935E−03 −1.2953E−03 R16 −2.7835E+00 −2.5232E−02 4.5128E−03 −5.3550E−04 −1.0300E−046.0743E−05 Conic coefficient Aspheric surface coefficients k A14 A16 A18A20 R1 −3.6434E−01 −2.1746E−01 1.7885E−01 −8.1702E−02  1.5992E−02 R2−7.4937E+01 −2.1561E+00 1.6750E+00 −6.7781E−01  1.1629E−01 R3 3.7233E+01 −1.8159E+00 9.4831E−01 −1.8090E−01 −5.1714E−03 R4−9.9000E+01 −4.4353E+00 1.7523E+00 −9.5492E−02 −8.3278E−02 R5−3.8842E+01 −1.9021E+01 1.4278E+01 −6.2303E+00  1.2164E+00 R6−5.5094E+01 −2.8975E+01 2.5213E+01 −1.2215E+01  2.4801E+00 R7−9.9000E+01 −3.3752E+01 3.1080E+01 −1.4669E+01  2.5271E+00 R8 5.3916E+01 −1.4926E+02 1.6462E+02 −9.4138E+01  2.1714E+01 R9−1.7234E+01 −1.0571E+02 1.2342E+02 −7.3667E+01  1.7720E+01 R10−2.9653E+00  9.5075E+00 −5.7514E+00   1.9150E+00 −2.6759E−01 R11 4.3867E+01  2.4530E+00 −1.4852E+00   5.2319E−01 −8.0008E−02 R12 3.6637E+01  2.7552E−02 −9.1569E−03   1.6379E−03 −1.2085E−04 R13−3.8980E+01  1.9778E−02 −5.1750E−03   7.5658E−04 −4.6326E−05 R14−9.9000E+01  3.0856E−03 −4.1850E−04   3.2907E−05 −1.1386E−06 R15−1.3113E+01  2.1188E−04 −2.3047E−05   1.4693E−06 −4.0884E−08 R16−2.7835E+00 −1.2840E−05 1.4561E−06 −8.6645E−08  2.0851E−09

Table 7 and table 8 show design data of inflexion points and arrestpoints of each lens of the camera optical lens 20 in Embodiment 2 of thepresent disclosure.

TABLE 7 Number(s) of Inflexion point Inflexion point Inflexion pointinflexion points position 1 position 2 position 3 P1R1 0 / / / P1R2 20.225 0.385 / P2R1 1 0.945 / / P2R2 2 0.885 0.995 / P3R1 1 0.695 / /P3R2 2 0.565 0.835 / P4R1 1 0.345 / / P4R2 0 / / / P5R1 0 / / / P5R2 20.505 0.595 / P6R1 1 0.235 / / P6R2 0 / / / P7R1 1 0.685 / / P7R2 11.265 / / P8R1 3 0.395 1.155 1.865 P8R2 1 0.515 / /

TABLE 8 Number(s) of Arrest point Arrest point Arrest point arrestpoints position 1 position 2 position 3 P1R1 0 / / / P1R2 0 / / / P2R1 0/ / / P2R2 0 / / / P3R1 1 0.895 / / P3R2 0 / / / P4R1 1 0.555 / / P4R2 0/ / / P5R1 0 / / / P5R2 0 / / / P6R1 1 0.415 / / P6R2 0 / / / P7R1 11.135 / / P7R2 0 / / / P8R1 3 0.835 1.475 2.065 P8R2 1 0.925 / /

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and470 nm after passing the camera optical lens 20 in Embodiment 2,respectively. FIG. 8 illustrates a schematic diagram of a fieldcurvature and a distortion of light with a wavelength of 555 nm afterpassing the camera optical lens 20 in Embodiment 2. A field curvature Sin FIG. 8 is a field curvature in a sagittal direction, and T is a fieldcurvature in a tangential direction.

As shown in the subsequent Table 13, the camera optical lens 20 inEmbodiment 2 satisfies the various conditions.

In this embodiment, an entrance pupil diameter (ENPD) of the cameraoptical lens 20 is 2.416 mm, an image height (IH) of 1.0H is 3.400 mm,and a field of view (FOV) in the diagonal direction is 52.90°. Thus, thecamera optical lens 20 achieves large aperture, long focal length andultra-thinness, the on-axis and off-axis chromatic aberration issufficiently corrected, thereby achieving excellent optical performance.

Embodiment 3

Embodiment 3, which provides a camera optical lens 30 structurally shownin FIG. 9 , is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

In this embodiment, the eighth lens L8 has a negative refractive power.

Table 9 and Table 10 show design data of a camera optical lens 30 inEmbodiment 3 of the present disclosure.

TABLE 9 R d nd νd S1 ∞ d0= 0.006 R1 1.727 d1= 0.811 nd1 1.5444 ν1 55.82R2 66.686 d2= 0.031 R3 13.567 d3= 0.230 nd2 1.6700 ν2 19.39 R4 72.066d4= 0.080 R5 −6.575 d5= 0.230 nd3 1.5444 ν3 55.82 R6 5.126 d6= 0.114 R77.113 d7= 0.230 nd4 1.5444 ν4 55.82 R8 −7.085 d8= 0.030 R9 −3.829 d9=0.254 nd5 1.6610 ν5 20.53 R10 6.955 d10= 0.069 R11 7.952 d11= 1.334 nd61.6700 ν6 19.39 R12 15.108 d12= 0.106 R13 −29.294 d13= 0.421 nd7 1.5444ν7 55.82 R14 9.92 d14= 0.430 R15 18.829 d15= 1.715 nd8 1.5844 ν8 28.22R16 13.787 d16= 0.201 R17 ∞ d17= 0.210 ndg 1.5168 νg 64.17 R18 ∞ d18=0.775

Table 10 shows aspheric surface data of each lens of the camera opticallens 30 in Embodiment 3 of the present disclosure.

TABLE 10 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10A12 R1 −3.6539E−01  1.0482E−02 1.2429E−03  8.2006E−03 −2.7890E−025.9587E−02 R2  9.9000E+01 −7.0438E−02 2.3835E−01 −3.2213E−01 −1.9621E−011.3065E+00 R3  4.7689E+01 −7.0633E−02 2.3651E−01 −1.9720E−01 −5.4069E−011.7130E+00 R4  2.6441E+01 −5.7509E−05 −1.4271E−01   9.7505E−01−2.6842E+00 3.9148E+00 R5 −3.7545E+01  5.1427E−02 −6.1822E−01  2.9234E+00 −8.0875E+00 1.4270E+01 R6 −5.7067E+01  1.2193E−01−8.1226E−01   3.1770E+00 −8.7189E+00 1.5926E+01 R7 −9.9000E+01−2.0733E−02 −4.5180E−01   1.8880E+00 −5.7934E+00 1.1802E+01 R8 4.9162E+01 −1.0277E−01 3.3119E−01  8.5896E−01 −1.1901E+01 4.4750E+01 R9−1.9066E+01 −5.0387E−02 4.1506E−01 −5.7680E−01 −5.6686E+00 2.8910E+01R10 −1.9411E+01 −1.2516E−01 3.9771E−01 −1.5494E+00  3.9751E+00−6.1717E+00  R11  4.4461E+01 −2.3154E−01 2.8158E−01 −6.9625E−01 1.5159E+00 −2.0999E+00  R12  8.0912E+01 −3.7733E−02 4.3830E−02−3.1949E−02  3.4177E−02 −2.9685E−02  R13 −9.9000E+01 −2.9878E−029.6802E−02 −1.0986E−01  8.1230E−02 −4.3816E−02  R14 −3.4984E+01−3.3842E−02 8.6994E−02 −8.0155E−02  4.1967E−02 −1.4207E−02  R15−1.9144E+01 −4.9220E−02 3.2475E−02 −1.3653E−02  4.3630E−03 −1.0855E−03 R16  3.7349E+00 −2.6364E−02 5.1256E−03 −9.1734E−04  4.0948E−052.5557E−05 Conic coefficient Aspheric surface coefficients k A14 A16 A18A20 R1 −3.6539E−01 −8.0183E−02 6.4883E−02 −2.9009E−02  5.5363E−03 R2 9.9000E+01 −1.9384E+00 1.4406E+00 −5.5569E−01  9.0204E−02 R3 4.7689E+01 −2.0363E+00 1.2054E+00 −3.4431E−01  3.5899E−02 R4 2.6441E+01 −2.9562E+00 8.3514E−01  1.7108E−01 −1.0614E−01 R5−3.7545E+01 −1.6246E+01 1.1707E+01 −4.8982E+00  9.1683E−01 R6−5.7067E+01 −1.8876E+01 1.3628E+01 −5.1429E+00  6.9534E−01 R7−9.9000E+01 −1.5347E+01 1.1239E+01 −3.3613E+00 −1.1207E−01 R8 4.9162E+01 −8.6247E+01 9.1373E+01 −5.0038E+01  1.0909E+01 R9−1.9066E+01 −6.1755E+01 6.9229E+01 −3.9650E+01  9.0776E+00 R10−1.9411E+01  5.9974E+00 −3.5514E+00   1.1585E+00 −1.5824E−01 R11 4.4461E+01  1.9120E+00 −1.1433E+00   4.0016E−01 −6.0858E−02 R12 8.0912E+01  1.6023E−02 −5.0897E−03   8.6309E−04 −5.9898E−05 R13−9.9000E+01  1.6792E−02 −4.1042E−03   5.5575E−04 −3.1390E−05 R14−3.4984E+01  3.1742E−03 −4.5253E−04   3.7186E−05 −1.3343E−06 R15−1.9144E+01  1.9969E−04 −2.4987E−05   1.8284E−06 −5.7570E−08 R16 3.7349E+00 −7.3149E−06 9.0770E−07 −5.4852E−08  1.2367E−09

Table 11 and Table 12 show design data of inflexion points and arrestpoints of each lens in the camera optical lens 30 in Embodiment 3 of thepresent disclosure.

TABLE 11 Number(s) of Inflexion Inflexion Inflexion Inflexion inflexionpoint point point point points position1 position 2 position 3 position4 P1R1 0 / / / / P1R2 4 0.155 0.495 0.625 0.685 P2R1 1 0.955 / / / P2R22 0.885 1.015 / / P3R1 1 0.715 / / / P3R2 2 0.565 0.815 / / P4R1 1 0.335/ / / P4R2 0 / / / / P5R1 0 / / / / P5R2 2 0.415 0.665 / / P6R1 1 0.245/ / / P6R2 0 / / / / P7R1 1 0.545 / / / P7R2 1 1.295 / / / P8R1 3 0.3351.235 1.745 / P8R2 1 0.515 / / /

TABLE 12 Number(s) of Arrest point Arrest point arrest points position 1position 2 P1R1 0 / / P1R2 2 0.285 0.825 P2R1 0 / / P2R2 0 / / P3R1 10.925 / P3R2 0 / / P4R1 1 0.555 / P4R2 0 / / P5R1 0 / / P5R2 0 / / P6R11 0.425 / P6R2 0 / / P7R1 1 0.865 / P7R2 0 / / P8R1 1 0.625 / P8R2 10.935 /

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 650 nm, 610 nm, 555 nm, 510 nm and470 nm after passing the camera optical lens 30 in Embodiment 3,respectively. FIG. 12 illustrates a schematic diagram of a fieldcurvature and a distortion of light with a wavelength of 555 nm afterpassing the camera optical lens 30 in Embodiment 3. A field curvature Sin FIG. 12 is a field curvature in a sagittal direction, and T is afield curvature in a tangential direction.

The subsequent Table 13 lists values corresponding to the variousconditions in the embodiments according to the above conditions.Apparently, the camera optical lens 30 in Embodiment 3 satisfies thevarious conditions.

In this embodiment, an entrance pupil diameter (ENPD) of the cameraoptical lens 30 is 2.482 mm, an image height (IH) of 1.0H is 3.400 mm,and a field of view (FOV) in the diagonal direction is 51.20°. Thus, thecamera optical lens 30 achieves large aperture, long focal length andultra-thinness, the on-axis and off-axis chromatic aberration issufficiently corrected, thereby achieving excellent optical performance.

TABLE 13 Parameters and Embodi- Embodi- Embodi- conditions ment 1 ment 2ment 3 f/TTL 0.96 0.96 0.96 f2/f 4.95 4.20 3.55 (R11 + R12)/(R11 − R12)−19.70 −11.01 −3.22 f 6.694 6.764 6.949 f1 3.141 3.154 3.232 f2 33.13628.421 24.678 f3 −5.756 −5.530 −5.237 f4 7.711 7.322 6.536 f5 −4.155−4.028 −3.669 f6 89.003 60.083 23.089 f7 −12.417 −12.367 −13.516 f889.233 119.537 −100.161 f12 2.895 2.876 2.914 FNO 2.80 2.80 2.80 TTL7.008 7.082 7.271 IH 3.400 3.400 3.400 FOV 53.29° 52.90° 51.20°

It will be understood by those of ordinary skill in the art that theembodiments described above are specific embodiments realizing thepresent disclosure, and that in practical applications, various changesmay be made thereto in form and in detail without departing from therange and scope of the disclosure.

What is claimed is:
 1. A camera optical lens comprising, from an objectside to an image side in sequence: a first lens having a positiverefractive power, a second lens having a positive refractive power, athird lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens,and an eighth lens; wherein the camera optical lens satisfies conditionsof:0.95≤f/TTL;3.50≤f2/f≤5.00; and−20.00≤(R11+R12)/(R11−R12)≤−3.00; where TTL denotes a total opticallength from an object-side surface of the first lens to an image surfaceof the camera optical lens along an optical axis; f denotes a focallength of the camera optical lens; f2 denotes a focal length of thesecond lens; R11 denotes a central curvature radius of an object-sidesurface of the sixth lens; and R12 denotes a central curvature radius ofan image-side surface of the sixth lens.
 2. The camera optical lensaccording to claim 1, wherein the camera optical lens further satisfiesa condition of:−7.50≤f6/f7≤−1.50; where f6 denotes a focal length of the sixth lens;and f7 denotes a focal length of the seventh lens.
 3. The camera opticallens according to claim 1, wherein the camera optical lens furthersatisfies conditions of:23≤f1/f≤0.70;−2.23≤(R1+R2)/(R1−R2)≤−0.70; and0.05≤d1/TTL≤0.17; where f1 denotes a focal length of the first lens; R1denotes a central curvature radius of the object-side surface of thefirst lens; R2 denotes a central curvature radius of an image-sidesurface of the first lens; and d1 denotes an on-axis thickness of thefirst lens.
 4. The camera optical lens according to claim 1, wherein thecamera optical lens further satisfies conditions of:−7.48≤(R3+R4)/(R3−R4)≤−0.98; and0.02≤d3/TTL≤0.05; where R3 denotes a central curvature radius of anobject-side surface of the second lens; R4 denotes a central curvatureradius of an image-side surface of the second lens; and d3 denotes anon-axis thickness of the second lens.
 5. The camera optical lensaccording to claim 1, wherein the camera optical lens further satisfiesconditions of:−1.72≤f3/f≤−0.50;0.06≤(R5+R6)/(R5−R6)≤0.56; and0.02≤d5/TTL≤0.05; where f3 denotes a focal length of the third lens; R5denotes a central curvature radius of an object-side surface of thethird lens; R6 denotes a central curvature radius of an image-sidesurface of the third lens; and d5 denotes an on-axis thickness of thethird lens.
 6. The camera optical lens according to claim 1, wherein thecamera optical lens further satisfies conditions of:0.47≤f4/f≤1.73;0≤(R7+R8)/(R7−R8)≤0.09; and0.02≤d7/TTL≤0.05; where f4 denotes a focal length of the fourth lens; R7denotes a central curvature radius of an object-side surface of thefourth lens; R8 denotes a central curvature radius of an image-sidesurface of the fourth lens; and d7 denotes an on-axis thickness of thefourth lens.
 7. The camera optical lens according to claim 1, whereinthe camera optical lens further satisfies following conditions:−1.24≤f5/f≤−0.35;−0.58≤(R9+R10)/(R9−R10)≤−0.18; and0.02≤d9/TTL≤0.05; where f5 denotes a focal length of the fifth lens; R9denotes a curvature radius of an object-side surface of the fifth lens;R10 denotes a curvature radius of an image-side surface of the fifthlens; and d9 denotes an on-axis thickness of the fifth lens.
 8. Thecamera optical lens according to claim 1, wherein the camera opticallens further satisfies a condition of:1.66≤f6/f≤19.94; and0.08≤d11/TTL≤0.28; where f6 denotes a focal length of the sixth lens;and d11 denotes an on-axis thickness of the sixth lens.
 9. The cameraoptical lens according to claim 1, wherein the camera optical lensfurther satisfies a condition of:−3.89≤f7/f≤−1.22;0.21≤(R13+R14)/(R13−R14)≤0.74; and0.03≤d13/TTL≤0.10; where f7 denotes a focal length of the seventh lens;R13 denotes a central curvature radius of an object-side surface of theseventh lens; R14 denotes a central curvature radius of an image-sidesurface of the seventh lens; and d13 denotes an on-axis thickness of theseventh lens.
 10. The camera optical lens according to claim 1, whereinthe camera optical lens further satisfies a condition of:−28.83≤f8/f≤26.51;−28.54≤(R15+R16)/(R15−R16)≤9.70; and0.12≤d15/TTL≤0.39; where f8 denotes a focal length of the eighth lens;R15 denotes a central curvature radius of an object-side surface of theeighth lens; R16 denotes a central curvature radius of an image-sidesurface of the eighth lens; and d15 denotes an on-axis thickness of theeighth lens.